Read PDFgear Aloud — Free TTS on Your Free PDF Reader
PDFgear is the free Acrobat alternative that researchers and freelancers have quietly switched to. CastReader adds the one thing it's missing: natural voice TTS with word-level highlight on the real PDFgear window. Select any text, click ▶, listen. Native Accessibility path — no Screen Recording permission.
macOS native · Free · No login · 40+ languages · Native AX, no OCR
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Highlight follows each spoken word directly inside your PDFgear window.
One App Covers Every Mac PDF & Research Reader
Same gesture, same word-level highlight — across every native PDF app researchers and students actually use.
Preview
Apple's PDF viewer
PDFgear
Free PDFKit reader
Adobe Acrobat Reader
Industry standard
Skim
Academic favorite
PDF Expert
Readdle paid PDF
Three Steps — Native, No OCR
PDFgear is built on Apple's PDFKit and exposes its text through macOS Accessibility. CastReader reads it directly — no screen capture, no OCR overhead.
Install
Download CastReader for Mac (.dmg). Grant Accessibility permission once. PDFgear doesn't need Screen Recording permission.
Select
Open any PDF in PDFgear. Drag-select the paragraph you want to hear — abstract, method, discussion, contract clause.
Click ▶
A play button appears next to your selection. One click — audio starts and the highlight glides inside the actual PDFgear window, word by word.
When PDFgear Users Add Read-Aloud
PDFgear users picked it for a reason — free, clean, fast, no Adobe upsells. Adding CastReader keeps everything free while solving the one missing feature.
Listen to dense contracts and ToS
Legal PDFs are the top PDFgear use case. Listening at 0.9× catches asymmetric clauses faster than speed-reading them on screen.
Hear research papers without eye strain
Students reading three papers a week for grad school — listening at 1.5× while eyes scan figures and equations halves session fatigue.
Proof-listen your own draft PDFs
Export your manuscript, report, or thesis to PDF, open in PDFgear, listen. Hearing your prose catches awkward phrasing eyes skim past.
Review scanned receipts and invoices
PDFgear's built-in OCR recognizes scanned text; CastReader reads the recognized layer aloud — good for audit review at 1.25×.
Read non-English PDFs
Chinese technical whitepapers, Japanese research, Spanish legal text — CastReader auto-detects and switches to native voices.
Stay free — no Adobe upsell
PDFgear is free forever. CastReader is free forever. No account, no credit card, no premium voice gate — stays true to the reason you picked PDFgear.
Why CastReader Is the Right TTS for PDFgear
macOS has a built-in Speak Selection, but it uses legacy voices, gives no visual highlight, and can't resume mid-paragraph. CastReader fixes all three on PDFgear.
Pixel-perfect highlight on the real window
Transparent overlay tracks each spoken word on the actual PDFgear PDF — not a clone pane or sidebar. Pixel-aligned via AX.
40+ natural voices
Kokoro-quality voices across English, Chinese, Japanese, Spanish, French, German — far better than macOS system say.
Variable speed, click to jump
1.5× for triage, 0.9× for careful reading. Click any word to resume from there — something system TTS can't do.
Matches PDFgear's free-forever ethos
No account, no daily word limit. PDFgear kept its promise to stay free; CastReader does the same.
Common Questions
How do I read PDFgear text aloud?▾
Install CastReader for Mac, grant Accessibility permission, open any PDF in PDFgear, drag-select a paragraph, then click the floating ▶. Word-level highlight appears on your real PDFgear window.
Does PDFgear have built-in text-to-speech?▾
PDFgear doesn't ship its own TTS. It relies on macOS Speak Selection (legacy voices, no highlight, no resume). CastReader adds Kokoro-quality voices, word-level highlight, and variable speed — everything the built-in lacks.
Does PDFgear need Screen Recording permission?▾
No. PDFgear is built on Apple PDFKit and exposes its text through macOS Accessibility. Only Accessibility permission is required.
Will it work on scanned PDFs?▾
PDFgear has built-in OCR for image PDFs. Once the OCR layer is applied, CastReader reads the recognized text the same way it reads native text PDFs.
Will CastReader conflict with PDFgear's own tools?▾
No. CastReader only triggers on explicit text selection + ▶ click. PDFgear's annotation, search, form-fill all work untouched.
Can I listen to Chinese or Japanese PDFs?▾
Yes. CastReader auto-detects CJK and switches to native Mandarin / Japanese / Korean voices at sentence boundaries.
Is PDFgear a good Acrobat alternative?▾
For reading and light annotation: yes, PDFgear is excellent and free. For commercial PDF workflows with advanced form, OCR accuracy, and legal signature features, Adobe Acrobat is still industry standard. Both work with CastReader TTS.
Is it really free?▾
Yes. 100% free — no account, no credit card, no premium voice gate, no daily word limit. Same free-forever model as PDFgear itself.
Ready to Add TTS to PDFgear?
Install once. Open any PDF in PDFgear. Select. Click ▶. Listen. Same free-forever deal as PDFgear itself.